[PATCH 1/3] media: ipu-bridge: Add ipu_bridge_get_ipu6()

[Sakari Ailus <sakari.ailus@linux.intel.com>]

Add ipu_bridge_get_ipu6() for obtaining the IPU 6 (or soon later) PCI
device. This isn't technically a job of the IPU bridge, but the
functionality is required in conjunction with the firmware definitions
that necessitate the use of the IPU bridge on many systems.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 drivers/media/pci/intel/ipu-bridge.c | 14 ++++++++++++++
 include/media/ipu-bridge.h           |  2 ++
 2 files changed, 16 insertions(+)

diff --git a/drivers/media/pci/intel/ipu-bridge.c b/drivers/media/pci/intel/ipu-bridge.c
index 7e65491faf6d..67a1f233c4c6 100644
--- a/drivers/media/pci/intel/ipu-bridge.c
+++ b/drivers/media/pci/intel/ipu-bridge.c
@@ -8,6 +8,7 @@
 #include <linux/dmi.h>
 #include <linux/i2c.h>
 #include <linux/mei_cl_bus.h>
+#include <linux/pci.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/property.h>
@@ -15,6 +16,7 @@
 #include <linux/workqueue.h>
 
 #include <media/ipu-bridge.h>
+#include <media/ipu6-pci-table.h>
 #include <media/v4l2-fwnode.h>
 
 #define ADEV_DEV(adev) ACPI_PTR(&((adev)->dev))
@@ -950,6 +952,18 @@ static int ipu_bridge_check_fwnode_graph(struct fwnode_handle *fwnode)
 	return ipu_bridge_check_fwnode_graph(fwnode->secondary);
 }
 
+struct pci_dev *ipu_bridge_get_ipu6(void)
+{
+	struct pci_dev *ipu = NULL;
+
+	for (unsigned int i = 0; !ipu && ipu6_pci_tbl[i].vendor; i++)
+		ipu = pci_get_device(ipu6_pci_tbl[i].vendor,
+				     ipu6_pci_tbl[i].device, NULL);
+
+	return ipu;
+}
+EXPORT_SYMBOL_NS_GPL(ipu_bridge_get_ipu6, "INTEL_IPU_BRIDGE");
+
 static DEFINE_MUTEX(ipu_bridge_mutex);
 
 int ipu_bridge_init(struct device *dev,
diff --git a/include/media/ipu-bridge.h b/include/media/ipu-bridge.h
index 16fac765456e..373c63f98999 100644
--- a/include/media/ipu-bridge.h
+++ b/include/media/ipu-bridge.h
@@ -169,12 +169,14 @@ struct ipu_bridge {
 };
 
 #if IS_ENABLED(CONFIG_IPU_BRIDGE)
+struct pci_dev *ipu_bridge_get_ipu6(void);
 int ipu_bridge_init(struct device *dev,
 		    ipu_parse_sensor_fwnode_t parse_sensor_fwnode);
 int ipu_bridge_parse_ssdb(struct acpi_device *adev, struct ipu_sensor *sensor);
 int ipu_bridge_instantiate_vcm(struct device *sensor);
 #else
 /* Use a define to avoid the @parse_sensor_fwnode argument getting evaluated */
+struct pci_dev *ipu_bridge_get_ipu6(void) { return NULL; }
 #define ipu_bridge_init(dev, parse_sensor_fwnode)	(0)
 static inline int ipu_bridge_instantiate_vcm(struct device *s) { return 0; }
 #endif
-- 
2.47.3